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oubleshooting oubleshooting
oubleshooting oubleshooting
oubleshooting (continued)
PROBLEM: UPS does not provide expected back up time.
Possible cause: UPS’s battery is weak from recent outage or wear.
Solution: The battery needs recharging after an extended
outage. The battery wears faster when put into service
often and when used at higher temperatures.
Possible cause: UPS is overloaded.
Solution: Check load using UPS’s output power bar graph (see
Sec. 5.2). Unplug non-critical equipment and printers.
PROBLEM: UPS shuts down if the Test button is held for more
than 4 seconds.
Possible cause: UPS is overloaded.
Solution: Reduce the UPS’s load by unplugging equipment.
Check load using Output Power display (see Sec. 5.2).
Possible cause: Weak battery.
Solution: Allow UPS to charge for at least five hours. If problem
persists, battery may need to be replaced.
PROBLEM: Indicators on front panel flash in a “marquee” fashion.
Possible cause: UPS has been shut down by computer software.
Solution: UPS will restart when AC power returns.
PROBLEM: All indicators are lit and UPS emits constant tone.
Possible cause: Internal UPS fault.
Solution: Do not attempt to use UPS. Turn off UPS and have it
serviced immediately.
PROBLEM: Site wiring fault light is lit—UPS operates normally.
Possible cause: Building wiring error such as missing ground or hot-
neutral reversal.
Solution: A qualified electrician should be summoned to correct
the building wiring.
7.0 Difficulty
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